Printed from Kezuriba (kezuriba.net/en/materials/a7475/)
A7475
ISO N (non-ferrous)Aluminum alloy (heat-treatable Al-Zn-Mg-Cu, 7000 series. A high-purity version of 7075 with reduced Fe and Si and improved fracture toughness). The JIS standard that covers it has not been confirmed.
🌐International equivalents
“Close” means composition or properties are not exactly the same. Before substituting, check the values in each standard.
| System | Designation | Number | Relation | Confidence |
|---|---|---|---|---|
| JIS | A7475 | — | ||
| AA | 7475 | UNS A97475 | identical (internationally registered alloy) | One source / reference[5][10][11] |
| EN | EN AW-7475ISO chemical symbol AlZn5.5MgCu(A) | EN AW-7475 | identical (internationally registered alloy) | Agrees in 2+ sources[12][13] |
| GB | — | — | Not confirmed |
Differences between the equivalents (from the sources)
- AA 7475: The alloy number 7475 is confirmed in AA Teal Sheets, AMS and the Japan Aluminium Association (equivalent to high confidence). However, no public page naming UNS number A97475 was found; it was inferred from ASTM B209M's explanation that "UNS numbers are the alloy number preceded by A9", so the whole row is rated medium
- EN EN AW-7475: OTTO FUCHS's table writes the chemical symbol as AlZn5,5MgCu (same as 7075), without (A)
📄Related specifications (AMS, ASTM etc.)
Specifications called up on purchase orders and drawings. AMS are SAE aerospace material specifications, split by product form (bar, plate, forging), melting practice and heat treatment. Standard texts are paid, so only titles and scopes checked on the publishers’ public pages are shown.
| Spec | Scope | Confidence |
|---|---|---|
| AMS 4202F | Aluminum Alloy Plate, 5.7Zn - 2.2Mg - 1.6Cu - 0.22Cr (7475-T7351), Solution Heat Treated, Stress Relieved by Stretching, and Precipitation Heat TreatedPlate (0.250–4.000in), T7351 (revised 2025-07-09) | Agrees in 2+ sources[10] |
| AMS 4089G | Aluminum Alloy, Plate, 1.6Cu - 2.2Mg - 0.22Cr - 5.7Zn (7475-T7651), Solution Heat Treated, Stress Relieved by Stretching, and Precipitation Heat TreatedPlate (0.250–1.500in), T7651 (revised 2025-02-25) | Agrees in 2+ sources[14] |
| AMS 4084E | Aluminum Alloy Sheet 5.7Zn - 2.2Mg - 1.6Cu - 0.22Cr (7475-T61) Solution and Precipitation Heat TreatedSheet, T61 (2017-06-15, Stabilized = treated as not to be revised in future) | Agrees in 2+ sources[15] |
All ASTM standards on Kezuriba: ASTM standards quick reference.
✈Main aerospace uses (as stated in the sources)
- A high-purity version of 7075 with improved fracture toughness, which shows superplasticity with special thermomechanical processing. Example application is aircraft (Japan Aluminium Association)[1]
- In a study of Boeing's integrally stiffened fuselage panels (skin and stiffeners machined from plate), it was considered the leading candidate for combining strength and fail-safe fracture performance. Z-stiffened 7475-T7351 integral panels were designed and evaluated (NASA-sponsored report)[16][17]
⚗Chemical composition (mass %)
As specified in Composition of AA internationally registered alloy (Japan Aluminium Association: alloys with the same four digits as a JIS alloy have identical chemical composition)
| Element | Range | Confidence |
|---|---|---|
| Si | ≤ 0.1 | Agrees in 2+ sources[5][6] |
| Fe | ≤ 0.12 | Agrees in 2+ sources[5][6] |
| Cu | 1.2 – 1.9 | Agrees in 2+ sources[5][6] |
| Mn | ≤ 0.06 | One source / reference[5] |
| Mg | 1.9 – 2.6 | Agrees in 2+ sources[5][6] |
| Cr | 0.18 – 0.25 | Agrees in 2+ sources[5][6] |
| Zn | 5.2 – 6.2 | Agrees in 2+ sources[5][6] |
| Ti | ≤ 0.06 | Agrees in 2+ sources[5][6] |
| Others (each / total) | ≤ 0.05 / 0.15 | One source / reference[5] |
| Al | Balance | One source / reference[5] |
⚖Density
2.81 g/cm³
Calculated value 2.81 in AA Teal Sheets, 2.81 in OTTO FUCHS (AZ62)
Calculate weight in A7475 →💪Mechanical properties
“Reference” values are not specified minimums from the standard but figures published by makers and others.
| Condition | Tensile MPa | Yield MPa | Elong. % | Hardness | Type of value |
|---|---|---|---|---|---|
| JIS specified value (both tempers and products) | — | — | — | — | JIS specified value Not confirmed |
| T7351 (plate, AMS 4202 specified values) / T7651 (plate, AMS 4089) / T61 (sheet, AMS 4084) | — | — | — | — | AMS specified value Not confirmed |
| T62 (extruded bar and profiles, thickness 1.001–2.000in) | ≥ 517 (75.0ksi) | ≥ 455 (66.0ksi) | ≥ 7 | — | AA specified value (Aluminum Standards and Data 2009 Table 11.1 "Mechanical Property Limits—Extruded Wire, Rod, Bar and Profiles". MPa converted from ksi) One source / reference[7] |
| Forgings and extrusions (no temper specified) | 420–540 | 355–470 | 5–8 (A5) | — | Reference value (OTTO FUCHS "Standard Values". Material code AZ62) One source / reference[8] |
| T7351/T7651 (plate, AA or manufacturer typical values) | — | — | — | — | Reference value (typical value) Not confirmed |
1 MPa ≈ 145 psi (0.145 ksi). Hardness conversion · unit converter
📚Sources
Primary sources (public documents from makers, industry associations and standards bodies), numbered where each value is cited. Many are in Japanese.
- aluminum.or.jp https://www.aluminum.or.jp/wp-content/themes/dp-colors/img/AboutAluminum.pdf#page=36
- sandvik.coromant.com https://www.sandvik.coromant.com/en-us/knowledge/materials/workpiece-materials
- kyocera.co.jp https://www.kyocera.co.jp/prdct/tool/wp-content/uploads/2014/07/2024-2026_A.pdf
- sumitool.com https://www.sumitool.com/downloads/cutting-tools/general-catalog/assets/pdf/a.pdf
- aluminum.org https://www.aluminum.org/sites/default/files/2021-11/TealSheet.pdf#page=23
- ntrs.nasa.gov https://ntrs.nasa.gov/api/citations/19770019328/downloads/19770019328.pdf#page=57
- aluminum.org https://www.aluminum.org/sites/default/files/2022-12/Table_11.1.pdf#page=3
- otto-fuchs.com https://www.otto-fuchs.com/downloads/02-technisch-werkstoff/werkstoff/ti-aluminium-en.pdf#…
- aluminum.org https://www.aluminum.org/sites/default/files/2021-11/TealSheet.pdf#page=32
- saemobilus.sae.org https://saemobilus.sae.org/content/AMS4202F/
- store.astm.org https://store.astm.org/b0209m-14.html
- aluminum.org https://www.aluminum.org/sites/default/files/2021-11/TealSheet.pdf#page=38
- otto-fuchs.com https://www.otto-fuchs.com/downloads/02-technisch-werkstoff/werkstoff/ti-aluminium-en.pdf#…
- saemobilus.sae.org https://saemobilus.sae.org/content/AMS4089G/
- saemobilus.sae.org https://saemobilus.sae.org/content/AMS4084E/
- ntrs.nasa.gov https://ntrs.nasa.gov/api/citations/20000057324/downloads/20000057324.pdf#page=41
- ntrs.nasa.gov https://ntrs.nasa.gov/api/citations/20000057324/downloads/20000057324.pdf#page=39
Other materials
Aerospace aluminum